Leak-proof hydraulic oil cylinder piston rod protective sleeve structure

Abstract

The utility model discloses a leakproof hydraulic oil cylinder piston rod protective sleeve structure, which belongs to the technical field of hydraulic oil cylinders and comprises an auxiliary structure, the inner wall of the auxiliary structure is slidably connected with a hydraulic oil cylinder piston rod body, and the bottom of the auxiliary structure is bolted with a hydraulic oil cylinder body. The bottom of the hydraulic oil cylinder body is fixedly connected with a buffering structure, the outer wall of the hydraulic oil cylinder piston rod body is sleeved with a sealing structure, the inner wall of the supporting ring is connected with the outer wall of the hydraulic oil cylinder piston rod body in a sleeved mode, an existing hydraulic oil cylinder piston rod generally has the problem of poor sealing performance, and in traditional design, the sealing structure is simple, and the sealing structure is not prone to deformation. As a result, a sealing element is aged or deformed due to long-time use, an oil leakage phenomenon is caused, the performance and the working stability of equipment are influenced, the damage risk of parts is aggravated, and the problems may significantly reduce the reliability and the efficiency of a hydraulic system.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to a leak-proof hydraulic cylinder piston rod protective sleeve structure. Background Technology

[0002] A hydraulic cylinder is an actuator that converts hydraulic energy into mechanical energy. It is widely used in various mechanical equipment, such as construction machinery, agricultural machinery, and industrial automation equipment. It achieves pushing and pulling actions through the reciprocating motion of an internal piston, thereby driving external loads to perform linear or rotary motion. The basic structure of a hydraulic cylinder includes a cylinder barrel, piston, piston rod, seals, and end caps. During operation, high-pressure oil supplied by a hydraulic pump enters one side of the cylinder, pushing the piston along the cylinder barrel; oil on the other side is squeezed out and returns to the oil tank. This pressure difference allows the piston to generate strong thrust or pull force, making it suitable for heavy-load and high-precision applications. Compared with electric actuators, hydraulic cylinders have advantages such as high output force, fast response speed, and high control precision, and can work stably in harsh environments. With technological advancements, modern hydraulic cylinder designs place greater emphasis on efficiency improvement, energy saving, and extended service life.

[0003] Existing hydraulic cylinder piston rods generally suffer from poor sealing. In traditional designs, the sealing structure is relatively simple, which leads to aging or deformation of the seals due to prolonged use, resulting in oil leakage. This affects equipment performance and operational stability, and increases the risk of component damage. These problems may significantly reduce the reliability and efficiency of the hydraulic system.

[0004] To address this, a leak-proof hydraulic cylinder piston rod protective sleeve structure is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a leak-proof hydraulic cylinder piston rod protective sleeve structure, which can solve the problem of poor sealing performance that is common in existing hydraulic cylinder piston rods. In traditional designs, the sealing structure is relatively simple, which leads to aging or deformation of the seals due to long-term use, resulting in oil leakage, affecting equipment performance and working stability, and increasing the risk of component damage. These problems may significantly reduce the reliability and efficiency of the hydraulic system.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a leak-proof hydraulic cylinder piston rod protective sleeve structure, including an auxiliary structure, a hydraulic cylinder piston rod body slidably connected to the inner wall of the auxiliary structure, a hydraulic cylinder body bolted to the bottom of the auxiliary structure, a buffer structure fixedly connected to the bottom of the hydraulic cylinder body, and a sealing structure sleeved on the outer wall of the hydraulic cylinder piston rod body.

[0007] The sealing structure includes a support ring, a sealing block, and a mating block. The inner wall of the support ring is sleeved with the outer wall of the hydraulic cylinder piston rod body. The outer wall of the support ring is bonded to the inner wall of the sealing block. The outer wall of the sealing block is bonded to the inner wall of the mating block. The outer wall of the mating block is slidably connected to the inner wall of the hydraulic cylinder body.

[0008] Preferably, the auxiliary structure includes a stabilizing ring, the inner wall of which is slidably connected to the outer wall of the hydraulic cylinder piston rod body.

[0009] Preferably, a fixing rod is fixedly connected to the bottom of the stabilizing ring, a mounting block is fixedly connected to the bottom of the fixing rod, a sealing cover is bolted to the bottom of the mounting block, and the inner wall of the sealing cover is slidably connected to the outer wall of the hydraulic cylinder piston rod body.

[0010] Preferably, the bottom of the sealing cover is bolted to the top of the hydraulic cylinder body, and a sealing element is adhered to the inner wall of the sealing cover. The inner wall of the sealing element is slidably connected to the outer wall of the hydraulic cylinder piston rod body.

[0011] Preferably, the buffer structure includes a fixing block, and the bottom of the hydraulic cylinder body is fixedly connected to the top of the fixing block.

[0012] Preferably, a connector is fixedly connected to the bottom of the fixing block, and a connecting hole is provided on the left side of the connector.

[0013] Preferably, a stabilizing block is fixedly connected to the top of the fixed block, and the outer wall of the stabilizing block is inserted into the inner wall of the hydraulic cylinder piston rod body.

[0014] Preferably, the top of the stabilizing block is provided with an insertion groove, and the inner wall of the insertion groove is inserted into the bottom of the outer wall of the hydraulic cylinder piston rod body.

[0015] Preferably, there are four fixing rods evenly distributed at the bottom of the stabilizing ring, and four mounting blocks are respectively disposed at the bottom of the four fixing rods.

[0016] Preferably, the bottom of the sealing cover is provided with an installation groove, and the top of the hydraulic cylinder body is fixedly connected with a connecting rod, and there are four connecting rods and four installation grooves.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. The sealing structure provided in this application enhances the sealing performance between the piston rod and the inner wall of the cylinder. The PTFE support ring provides stable support, the high-elasticity fluororubber sealing block fits tightly against the piston rod surface to form the main sealing barrier, and the ceramic mating block reduces friction, extends the seal life, and reduces hydraulic oil leakage.

[0019] 2. The auxiliary structure provided in this application improves the stability of the hydraulic cylinder piston rod movement and the sealing performance of the overall device. The stabilizing ring and fixing rod ensure the straightness of the piston rod during extension and retraction. The sealing cover is equipped with a seal to further reduce the risk of oil leakage. The overall design enhances the reliability and durability of the equipment. Attached Figure Description

[0020] Figure 1 This is an overall structural diagram of the anti-leakage hydraulic cylinder piston rod protective sleeve structure of this utility model;

[0021] Figure 2 This is an exploded view of the sealing structure of this utility model;

[0022] Figure 3 This is a connection diagram showing the cutting of the auxiliary structure of this utility model;

[0023] Figure 4 This is a cut-out diagram of the connection of the buffer structure part of this utility model;

[0024] Figure 5 This is a connection diagram of the piston rod body of the hydraulic cylinder of this utility model;

[0025] Figure 6 This is a connection diagram showing the cut-off of the hydraulic cylinder body of this utility model.

[0026] In the diagram, 1. Auxiliary structure; 11. Stabilizing ring; 12. Fixing rod; 13. Mounting block; 14. Sealing cover; 15. Seal; 2. Hydraulic cylinder piston rod body; 3. Hydraulic cylinder body; 4. Buffer structure; 41. Fixing block; 42. Connecting piece; 43. Stabilizing block; 5. Sealing structure; 51. Support ring; 52. Sealing block; 53. Mating block; 6. Insertion groove; 7. Mounting groove; 8. Connecting rod; 9. Connecting hole. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-6 The present invention provides the following technical solution:

[0029] A leak-proof hydraulic cylinder piston rod protective sleeve structure includes an auxiliary structure 1, a hydraulic cylinder piston rod body 2 slidably connected to the inner wall of the auxiliary structure 1, a hydraulic cylinder body 3 bolted to the bottom of the auxiliary structure 1, a buffer structure 4 fixedly connected to the bottom of the hydraulic cylinder body 3, and a sealing structure 5 sleeved on the outer wall of the hydraulic cylinder piston rod body 2.

[0030] The sealing structure 5 includes a support ring 51, a sealing block 52, and a mating block 53. The inner wall of the support ring 51 is sleeved with the outer wall of the hydraulic cylinder piston rod body 2. The outer wall of the support ring 51 is bonded to the inner wall of the sealing block 52. The outer wall of the sealing block 52 is bonded to the inner wall of the mating block 53. The outer wall of the mating block 53 is slidably connected to the inner wall of the hydraulic cylinder body 3.

[0031] In this embodiment: a complete hydraulic cylinder can be assembled by setting an auxiliary structure 1, a hydraulic cylinder piston rod body 2, a hydraulic cylinder body 3, and a buffer structure 4. The auxiliary structure 1 is connected to the hydraulic cylinder body 3 to increase the stability of the movement of the hydraulic cylinder piston rod body 2. The buffer structure 4, fixed at the bottom of the hydraulic cylinder body 3, is used to buffer the contraction of the hydraulic cylinder piston rod body 2 to a certain extent. The sealing structure 5 is set on the outer wall of the hydraulic cylinder piston rod body 2 and is located at the bottom of the piston component on the hydraulic cylinder piston rod body 2 to increase... To improve the sealing performance of the piston components in contact with the hydraulic cylinder piston rod body 2 and reduce the probability of oil leakage during their operation, the following measures are taken: The support ring 51 is made of PTFE and is fitted onto the outer wall of the hydraulic cylinder piston rod body 2, providing overall support for the sealing structure 5; the sealing block 52 is made of highly elastic, oil-resistant, and temperature-resistant fluororubber, which fits tightly against the piston rod surface to form the main sealing barrier; and the mating block 53 is made of ceramic material, which reduces friction between the sealing structure 5 and the inner wall of the hydraulic cylinder body 3, thereby extending the service life of the sealing structure 5.

[0032] Specifically, such as Figure 3 , Figure 5 , Figure 6 As shown, the auxiliary structure 1 includes a stabilizing ring 11, the inner wall of which is slidably connected to the outer wall of the hydraulic cylinder piston rod body 2.

[0033] Specifically, such as Figure 3 , Figure 5 , Figure 6 As shown, a fixing rod 12 is fixedly connected to the bottom of the stabilizing ring 11, and a mounting block 13 is fixedly connected to the bottom of the fixing rod 12. A sealing cover 14 is bolted to the bottom of the mounting block 13, and the inner wall of the sealing cover 14 is slidably connected to the outer wall of the hydraulic cylinder piston rod body 2.

[0034] Specifically, such as Figure 3 , Figure 5 , Figure 6As shown, the bottom of the sealing cover 14 is bolted to the top of the hydraulic cylinder body 3, and a sealing element 15 is bonded to the inner wall of the sealing cover 14. The inner wall of the sealing element 15 is slidably connected to the outer wall of the hydraulic cylinder piston rod body 2.

[0035] In this embodiment: by setting an auxiliary structure 1, wherein the sealing cover 14 is located on the hydraulic cylinder piston rod body 2 and installed on the top of the hydraulic cylinder body 3, the hydraulic cylinder body 3 is sealed while the extension and retraction of the hydraulic cylinder piston rod body 2 is stabilized. By setting the sealing element 15 on the inner wall of the sealing cover 14 to be made of rubber, the sealing performance between the sealing cover 14 and the hydraulic cylinder piston rod body 2 is increased, and the probability of oil leakage is reduced to a certain extent. By setting the mounting block 13 connected to the top of the sealing cover 14, and the fixing rod 12 fixed on the top of the mounting block 13, the stabilizing ring 11 is supported and stabilized. By setting the stabilizing ring 11 on the outer wall of the hydraulic cylinder piston rod body 2, the stability of the extension and retraction of the hydraulic cylinder piston rod body 2 is further increased, and the friction between the outer wall of the hydraulic cylinder piston rod body 2 and the inner wall of the sealing cover 14 is reduced to a certain extent.

[0036] Specifically, such as Figure 3 , Figure 4 , Figure 6 As shown, the buffer structure 4 includes a fixing block 41, and the bottom of the hydraulic cylinder body 3 is fixedly connected to the top of the fixing block 41.

[0037] Specifically, such as Figure 3 , Figure 4 , Figure 6 As shown, a connector 42 is fixedly connected to the bottom of the fixing block 41, and a connection hole 9 is provided on the left side of the connector 42.

[0038] Specifically, such as Figure 3 , Figure 4 , Figure 6 As shown, a stabilizing block 43 is fixedly connected to the top of the fixing block 41, and the outer wall of the stabilizing block 43 is inserted into the inner wall of the hydraulic cylinder piston rod body 2.

[0039] In this embodiment: By setting a buffer structure 4, wherein the fixing block 41 is fixed to the bottom of the hydraulic cylinder piston rod body 2, the buffer structure 4 can be fixed to the bottom of the hydraulic cylinder piston rod body 2, and achieves the function of sealing the bottom of the hydraulic cylinder piston rod body 2. By setting a connecting piece 42 fixed to the bottom of the fixing block 41, and the connecting piece 42 having a connecting hole 9, the user can install and fix the hydraulic cylinder body 3 through the buffer structure 4. By setting a stabilizing block 43 fixed to the top of the fixing block 41, the hydraulic cylinder piston rod body 2 can be inserted into the inner wall of the stabilizing block 43 when it retracts. There is an appropriate gap between the inner wall of the stabilizing block 43 and the hydraulic cylinder piston rod body 2. During the retraction of the hydraulic cylinder piston rod body 2, the gap can provide a certain amount of movement space, reduce friction, and play a certain degree of buffering role.

[0040] Specifically, such as Figure 4 As shown, the top of the stabilizing block 43 is provided with a plug-in groove 6, and the inner wall of the plug-in groove 6 is plugged into the bottom of the outer wall of the hydraulic cylinder piston rod body 2.

[0041] Specifically, such as Figure 3 , Figure 4 As shown, there are four fixing rods 12 evenly distributed at the bottom of the stabilizing ring 11, and four mounting blocks 13 are respectively set at the bottom of the four fixing rods 12.

[0042] Specifically, such as Figure 3 As shown, the bottom of the closed cover 14 is provided with an installation groove 7, and the top of the hydraulic cylinder body 3 is fixedly connected with a connecting rod 8. There are four connecting rods 8 and four installation grooves 7.

[0043] In this embodiment: the insertion slot 6 on the top of the stabilizing block 43 allows the hydraulic cylinder piston rod body 2 to be inserted into the inner wall of the stabilizing block 43 during retraction, further increasing the stability of the hydraulic cylinder piston rod body 2. By setting four fixing rods 12 and four mounting blocks 13 to connect between the stabilizing ring 11 and the sealing cover 14, the stabilizing ring 11 provides auxiliary stabilization for the hydraulic cylinder piston rod body 2. The mounting slot 7 at the bottom of the sealing cover 14 and the connecting rod 8 fixed at the top of the hydraulic cylinder body 3 ensure that the connection between the sealing cover 14 and the hydraulic cylinder body 3 is first inserted and stabilized, and then bolted and fixed, increasing the stability of the connection.

[0044] Working Principle: When the hydraulic cylinder piston rod body 2 is in motion, firstly, the stabilizing ring 11 in the auxiliary structure 1, whose inner wall is slidably connected to the outer wall of the hydraulic cylinder piston rod body 2, provides initial guidance and support. Four evenly distributed fixing rods 12 are fixed to the bottom of the stabilizing ring 11. These fixing rods 12 are further connected to the mounting block 13, and the entire structure is fixed to the top of the hydraulic cylinder body 3 by the sealing cover 14. The inner wall of the sealing cover 14 is provided with a rubber seal 15, which tightly fits the piston rod surface, increasing the sealing performance between the sealing cover 14 and the hydraulic cylinder piston rod body 2, reducing the risk of oil leakage. Furthermore, the presence of the stabilizing ring 11 reduces friction between the piston rod and the sealing cover 14, improving the smoothness of movement. The sealing structure 5 is a key part in preventing leakage and is located in the hydraulic... The piston rod body 2 is located on the outer wall of the hydraulic cylinder and below the piston assembly. The support ring 51 is made of PTFE and is fitted onto the outer wall of the piston rod to provide rigid support for the sealing structure 5. The sealing block 52 is made of highly elastic, oil-resistant, and temperature-resistant fluororubber material, which fits tightly against the piston rod surface to form the main sealing barrier. The mating block 53 is made of ceramic material and slides with the inner wall of the hydraulic cylinder body 3 to reduce friction and extend the service life of the sealing structure 5. The three-layer composite sealing design effectively prevents hydraulic oil from leaking between the piston rod and the cylinder body. The buffer structure 4 is located at the bottom of the hydraulic cylinder body 3. When the hydraulic cylinder piston rod body 2 retracts, its bottom can be inserted into the insertion groove 6. The appropriate gap between the stabilizing block 43 and the hydraulic cylinder piston rod body 2 provides room for movement, reduces friction, and plays a buffering role.

[0045] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A leak-proof hydraulic cylinder piston rod protective sleeve structure, comprising an auxiliary structure (1), characterized in that: The inner wall of the auxiliary structure (1) is slidably connected to the hydraulic cylinder piston rod body (2), the bottom of the auxiliary structure (1) is bolted to the hydraulic cylinder body (3), the bottom of the hydraulic cylinder body (3) is fixedly connected to the buffer structure (4), and the outer wall of the hydraulic cylinder piston rod body (2) is fitted with a sealing structure (5). The sealing structure (5) includes a support ring (51), a sealing block (52), and a mating block (53). The inner wall of the support ring (51) is sleeved with the outer wall of the hydraulic cylinder piston rod body (2). The outer wall of the support ring (51) is bonded to the inner wall of the sealing block (52). The outer wall of the sealing block (52) is bonded to the inner wall of the mating block (53). The outer wall of the mating block (53) is slidably connected to the inner wall of the hydraulic cylinder body (3).

2. The anti-leakage hydraulic cylinder piston rod protective sleeve structure according to claim 1, characterized in that: The auxiliary structure (1) includes a stabilizing ring (11), the inner wall of which is slidably connected to the outer wall of the hydraulic cylinder piston rod body (2).

3. The anti-leakage hydraulic cylinder piston rod protective sleeve structure according to claim 2, characterized in that: The bottom of the stabilizing ring (11) is fixedly connected to a fixing rod (12), the bottom of the fixing rod (12) is fixedly connected to a mounting block (13), the bottom of the mounting block (13) is bolted with a sealing cover (14), and the inner wall of the sealing cover (14) is slidably connected to the outer wall of the hydraulic cylinder piston rod body (2).

4. The anti-leakage hydraulic cylinder piston rod protective sleeve structure according to claim 3, characterized in that: The bottom of the sealing cover (14) is bolted to the top of the hydraulic cylinder body (3), and a sealing element (15) is bonded to the inner wall of the sealing cover (14). The inner wall of the sealing element (15) is slidably connected to the outer wall of the hydraulic cylinder piston rod body (2).

5. The anti-leakage hydraulic cylinder piston rod protective sleeve structure according to claim 1, characterized in that: The buffer structure (4) includes a fixing block (41), and the bottom of the hydraulic cylinder body (3) is fixedly connected to the top of the fixing block (41).

6. The anti-leakage hydraulic cylinder piston rod protective sleeve structure according to claim 5, characterized in that: The bottom of the fixing block (41) is fixedly connected to a connector (42), and a connection hole (9) is provided on the left side of the connector (42).

7. The anti-leakage hydraulic cylinder piston rod protective sleeve structure according to claim 5, characterized in that: A stabilizing block (43) is fixedly connected to the top of the fixing block (41), and the outer wall of the stabilizing block (43) is inserted into the inner wall of the hydraulic cylinder piston rod body (2).

8. The anti-leakage hydraulic cylinder piston rod protective sleeve structure according to claim 7, characterized in that: The top of the stabilizing block (43) is provided with a plug groove (6), and the inner wall of the plug groove (6) is plugged into the bottom of the outer wall of the hydraulic cylinder piston rod body (2).

9. The anti-leakage hydraulic cylinder piston rod protective sleeve structure according to claim 3, characterized in that: The number of fixing rods (12) is four and they are evenly distributed at the bottom of the stabilizing ring (11). The number of mounting blocks (13) is four and they are respectively set at the bottom of the four fixing rods (12).

10. The anti-leakage hydraulic cylinder piston rod protective sleeve structure according to claim 3, characterized in that: The bottom of the closed cover (14) is provided with an installation groove (7), and the top of the hydraulic cylinder body (3) is fixedly connected with a connecting rod (8). There are four connecting rods (8) and four installation grooves (7).

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